I've been using the 85, 90, and 105 on the M8 lately for Spring flowers. I also used the 85/2 for an inside roller skating rink. The telephoto's focus down to 3ft, gives good close-ups for flowers. The 85/2 is fast enough and covers the distance to the action. I find that panning to catch the skaters is easier with the M8 as the viewfinder does not black-out during the exposure.
105/2.5 Nikkor on the M8.
85/2 Nikkor on the M8. ~1/30th shutter speed.